Water and weirdness on Mars
Our Mars program has made two interesting discoveries.
So what, you ask? Because high concentrations of silica form under only two known conditions: a hot spring, or a fumarole of acidic steam. On earth, both areas teem with life. In other words, conditions on Mars were once favorable for supporting life.
That's the name for multi-legged gullies like the one in the picture above, which radiate out from a central point.
Turns out the gullies are caused by carbon dioxide ice thawing and then flowing *uphill* to concentrate at the center, where they erupt in geysers, then freeze and fall back to the ground as carbon dioxide snow.
Just a reminder that, however Earthlike Mars might have been in the past, it sure isn't now.
science, Mars, politics, midtopia